I was not actually presenting a scenario where my grandmother would use a VPN.

I was pointing out that this community is full of people who are perfectly capable of learning to use a VPN. In response to this comment:

Unfortunately, not everyone is tech-literate enough nowadays to understand how a VPN works, nor do they want to

That's a true statement about 'everyone' i.e. the entire population of the planet... but true about everyone here in this community.